A practical, side-by-side look at the three most commonly used 3D formats
FBX, OBJ, and GLTF are the three formats you'll run into most often when moving 3D content between tools, engines, and platforms. They overlap in some ways, but each one was designed with a different priority in mind — and picking the wrong one usually costs you either compatibility, file size, or missing data. Here's how they actually compare.
FBX stores skeletal rigs, bone weights, and animation curves natively. OBJ has no concept of animation at all — it's static geometry only. GLTF supports animation but with a simpler, more limited rigging model than FBX.
GLTF/GLB was engineered specifically for compact size and fast parsing — often significantly smaller than an equivalent FBX file. This is why it's the preferred format for web and mobile delivery.
Because OBJ only describes static mesh data, virtually every 3D application ever built — old or new — can open it without issue. It's the safest fallback when you don't know what the receiving software supports.
Unity, Unreal, and Godot all import both formats well. FBX is still the more common export target from DCC tools like Maya and Blender, while GLTF is increasingly the preferred format for runtime loading and asset streaming.
Choose FBX if you're exporting an animated or rigged character from a DCC tool into a game engine — it's still the industry default for that pipeline.
Choose GLTF/GLB if your model is going on a website, into WebXR, or anywhere file size and load time matter more than editing flexibility.
Choose OBJ if you just need a static mesh that will open reliably in almost any software — sculpting exports, 3D scans, or simple prop assets.
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